Some confusing chickens- what gender?

I have some 19 week old chickies! I have 6 total, A home bred Blue Orpington x Speckled Sussex, a golden campine, a silver lakenvelder, and 3 white Cochins. I know 100% of the cochin genders. 2 girls and a boy. These three confuse me though.

This is Hershey. I hatched this fluffy myself. S/he is a Blue Orpington x Speckled Sussex. This chicken is literally TWICE the size of all the adults. That is not surprising though as her/his father was the same size. S/he also has HUGE feet. It took me a long time to sex her/his daddy too. We didn't know he was a boy until he crowed. Hershey is not mean or dominant, but S/he is confident. Very brave and playful.

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Next up we have Dakota. This adorable little thing is a Golden Campine. S/he is my smallest baby, and very flighty. I think that's just a light breed thing though. S/he has tiny feet! Sorry the side view is blurry. Stinker would NOT hold still!

Last but not least is Indiana. My Silver Lakenvelder. Very small feet, and VERY flighty. Indiana also is pretty mean.

This is just for grins and giggles, but sometimes she looks like a black and white peahen! Haha!

I set fire to the rain! Watch it pour as I, touched your face. Well it burn while I cried, because I heard it screaming out your name. And I threw us into flames. I knew that was the last time, the last time...I set fire to the rain! -Adele

I set fire to the rain! Watch it pour as I, touched your face. Well it burn while I cried, because I heard it screaming out your name. And I threw us into flames. I knew that was the last time, the last time...I set fire to the rain! -Adele